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Poster: glenn Date: Jan 29, 2005 7:43am
Forum: etree Subject: Re: quallity loss?

cds and dvds are likely good for 5-10 years with use, longer with meticulous care, clean environment, no UV exposure etc.

Good News: The one way to keep archived data around forever is to continually copy it to new discs... and since these shn files are shared among thousands, if you find that one track or one disc or one show has 'gone bad', just let your friends know you need to replace it. somewhere there is still a good copy available. In other words, the more you share your shns and flacs, the longer they will last, regardless of if you save them to HDD or CD or DVD or 'New technology superduperdisc'... sharing music is the One True Perfect Archive Solution.

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Poster: little brother Date: Jan 29, 2005 1:54pm
Forum: etree Subject: Re: quallity loss?

I DO AGREE WITH THIS 100%. aND i VERY MUCH respect your oppinion on the lifetime of a disk. So what you're saying is that if I burn a disk with well working equipment and the burn is successful, and then put it in a case and put the case in my safe, and don't touch it. Now if say my grandkids find this disk 60 years later(assuming they still have cd players) you don't believe it will play properly? Or perhaps not at all? I don't really know alot about how the info gets burned onto the disk, but is it the info on the disk that won't last , or the disk it's self?
And thanks again for your input, PEACE

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Poster: glenn Date: Jan 31, 2005 3:19am
Forum: etree Subject: Re: quallity loss?

The disc itself will fail eventually. Most plastics are to some extent volatile, and outgas vapor continuously. The plastic of the disc itself will eventually become brittle. However it seems likely that the disc will outlast the integrity of the data layer, as the pits and lands (1s and 0s, effectively) are microscopic, and can be affected by very small changes. Keeping the disc clean, unscratched, in a stable temperature and not exposed to prolonged UV (sunlight or fluorescent light etc.) will keep the disc 'good' for 'longer'. I think 60 years would be a mid-range optimistic estimate, but you can pretty much count on at least 5 years in reality, and some will last longer. In those 5 years, make shn or flac copies for 10 people, and the music could last forever, especially if those 10 make copies.
Use discs with a good solid opaque top layer and you increase your chances of lasting longer.

I don't make audio copies myself, I listen to shns on my computer, which is effectively my sound system. When shn files turn up 'bad' I usually can replace them real quick doing a search for the md5 string for the failed track... or contact some of my friends and see if they have it.

Always share your music a lot, and it will last forever. Maybe. It will likely outlast us at least.